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Mainframe Application Developer to design, develop, and maintain enterprise-grade mainframeS.i. Systems • Toronto
Mainframe Application Developer to design, develop, and maintain enterprise-grade mainframe

Mainframe Application Developer to design, develop, and maintain enterprise-grade mainframe

S.i. Systems • Toronto
30+ days ago
Job type
  • Full-time
  • Temporary
Job description

Our financial services client is seeking a Mainframe Application Developer to design, develop, and maintain enterprise-grade mainframe applications using COBOL, CICS, PL/1, JCL, DB2, and VSAM

Start Date: 1 Aug

Duration: 3 months - Short Term Contract with Strong possibility of conversion into full-time positions

Location: Downtown Toronto - Hybrid - 2 days in office (Tuesday and Thursday **subject to change**)

Join a team within retail investments focused on delivering secure, scalable, and reliable mainframe solutions supporting business-critical operations. This short-term contract offers immediate engagement and strong potential for full-time conversion within months. The role provides visibility across enterprise architecture and technology strategy while contributing to modernization and continuous improvement initiatives.

Must Haves

  • 3–5 years of mainframe development including COBOL, CICS, PL/1, JCL, DB2, and VSAM
  • Proficiency in z/OS environments applying enterprise architecture and security standards
  • Hands-on work with EASYTRIEVE and FOCUS scripting on mainframe systems
  • Knowledge of Jira, Confluence, and ServiceNow for development coordination
  • Post-secondary education in Computer Science or related field

Nice to Have

  • Exposure to AI technologies and mainframe modernization initiatives
  • Experience with CSF Designer

Responsibilities

  • Designs, develops, tests, and implements mainframe applications aligned with business and technology requirements.
  • Translates business needs into detailed technical specifications and high-quality code.
  • Ensures solutions meet enterprise standards for security, performance, and operational excellence.
  • Analyzes system impacts across upstream and downstream dependencies.
  • Supports production stability through root cause analysis and timely issue resolution.
  • Evaluates and recommends improvements to technology, processes, and system efficiency.
  • Builds scalable, maintainable, and reusable solutions aligned with enterprise objectives.
  • Collaborates with business and technology stakeholders to deliver aligned outcomes.
  • Reviews code and provides guidance to support team effectiveness and quality.
  • Contributes to development standards, frameworks, and continuous improvement initiatives.
  • Supports delivery of project outcomes and operational priorities.
  • Mentors team members and contributes to knowledge sharing and capability development.


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Mainframe Application Developer to design, develop, and maintain enterprise-grade mainframe applications using COBOL, CICS, PL/1, JCL, DB2, and VSAM - JP909 • Toronto

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